diff --git a/Strategies/Standard/STR0013/STR0013.lua b/Strategies/Standard/STR0013/STR0013.lua
index 4bc25f2..8b280a2 100644
--- a/Strategies/Standard/STR0013/STR0013.lua
+++ b/Strategies/Standard/STR0013/STR0013.lua
@@ -40,6 +40,8 @@ local function GetDrillingWithMillStrategy( Proc, Part)
       ToolSearchParameters.sType = 'MILL_STD'
       ToolSearchParameters.sMillShape = 'STANDARD'
       Milling2.vtToolDirection = -Proc.FeatureInfo.vtDrillExtrusion
+      Milling2.bInvert = true
+      Milling2.bToolInvert = true
       Milling2.ToolInfo = MachiningLib.FindMill( Proc, ToolSearchParameters)
    end
 
@@ -83,12 +85,12 @@ local function GetDrillingWithMillStrategy( Proc, Part)
    -- aggiunta lavorazioni a lista
    -- se foro doppio
    if bDouble then
-      dResidual = Milling.ToolInfo.dResidualDepth + Milling2.ToolInfo.dResidualDepth
+      dResidual = Milling.ToolInfo.dResidualDepth + Milling2.ToolInfo.dResidualDepth - Proc.FeatureInfo.dDrillLen
       Strategy.Result.dMRR = ( MachiningLib.GetToolMRR( Milling.ToolInfo) + MachiningLib.GetToolMRR( Milling2.ToolInfo)) / 2
       local dExtraDrill = ( Proc.FeatureInfo.dDrillLen - BeamData.MILL_OVERLAP - ( Milling.ToolInfo.dResidualDepth + Milling2.ToolInfo.dResidualDepth)) / 2
-      Milling.sDepth = Proc.FeatureInfo.dDrillLen - Drilling.ToolInfo.dResidualDepth - dExtraDrill
+      Milling.sDepth = Proc.FeatureInfo.dDrillLen - Milling.ToolInfo.dResidualDepth - dExtraDrill
       table.insert( Machining, Milling)
-      Milling2.sDepth = Proc.FeatureInfo.dDrillLen - Drilling.ToolInfo.dResidualDepth - dExtraDrill
+      Milling2.sDepth = Proc.FeatureInfo.dDrillLen - Milling2.ToolInfo.dResidualDepth - dExtraDrill
       table.insert( Machining, Milling2)
    -- altrimenti singolo
    else
@@ -161,8 +163,8 @@ function STR0013.Make( bAddMachining, Proc, Part, CustomParameters)
       for j = 1, #Strategy.Machinings do
          local MachiningToAdd
          local nIndexTool = Strategy.Machinings[j].ToolInfo.nToolIndex
-         -- se fresa più grande del diametro foro si fa foratura con fresa (se ammesso)
-         if TOOLS[nIndexTool].dDiameter >= Proc.FeatureInfo.dDrillDiam and Strategy.Parameters.bUseMillAsDrill then
+         -- se diametro fresa differisce al massimo della tolleranza si fa foratura con fresa (se ammesso)
+         if abs( TOOLS[nIndexTool].dDiameter - Proc.FeatureInfo.dDrillDiam) < Strategy.Parameters.dDiameterTolerance and Strategy.Parameters.bUseMillAsDrill then
             MachiningToAdd = MachiningLib.InitMachiningParameters( MCH_MY.DRILLING)
             MachiningToAdd = BeamLib.MergeTables( MachiningToAdd, Strategy.Machinings[j])
             MachiningToAdd.Steps.dStep = TOOLS[nIndexTool].dStep / 3
@@ -172,7 +174,7 @@ function STR0013.Make( bAddMachining, Proc, Part, CustomParameters)
             MachiningToAdd = BeamLib.MergeTables( MachiningToAdd, Strategy.Machinings[j])
             -- il diametro deve essere almeno 1mm più grande del foro, altrimenti la macchina non riesce ad interpolare
             MachiningToAdd.dRadialOffset = min( 0, Proc.FeatureInfo.dDrillDiam - ( TOOLS[nIndexTool].dDiameter + 1))
-            MachiningToAdd.nSubType = MCH_MILL_ST.SPIRAL
+            MachiningToAdd.Steps.nStepType = MCH_MILL_ST.SPIRAL
             MachiningToAdd.Steps.dStep = TOOLS[nIndexTool].dStep
          -- se diametro foro più grande del doppio del diametro fresa, si fa svuotatura
          else